FOODMANAC · KNOW YOUR NUMBERS
BMR Calculator
Estimate resting energy with the simplified Mifflin–St Jeor equation and understand how it differs from daily calorie expenditure.
Your details
YOUR ESTIMATE
Start with your details
Enter your measurements to see the calculation and its assumptions.
Connect your numbers to real food
Search Foodmanac’s existing food database. Choose the correct preparation and compare its recorded nutrient basis with a portion you actually eat.
How to use this bmr calculator
Although commonly called a BMR calculator, the equation predicts resting energy expenditure. Strict basal measurement has different laboratory conditions. This result excludes most activity and is not a recommended daily food intake. The source population was adults aged 19–78; this suite is limited to 20–78.
Formula and assumptions
Resting kcal/day = 10 × kg + 6.25 × cm − 5 × age + 5 (male) or −161 (female).
Example calculation
For a 30-year-old female at 70 kg and 175 cm: 700 + 1,093.75 − 150 − 161 = 1,482.75 kcal/day.
Frequently asked questions
Is BMR a calorie target?
No. Daily needs also include activity and other energy expenditure.
Why does the equation ask for sex?
The published equation uses male and female coefficients. These are model inputs, not a statement about identity, and may fit some individuals poorly.
Should I select an activity level?
No activity input is needed for resting expenditure. The TDEE calculator adds activity.
How do I measure my height?
Stand without shoes and use centimetres or total inches. In imperial units multiply feet by 12, then add the remaining inches.
Why is this called BMR when it predicts resting energy?
BMR is a familiar search term, but the Mifflin equation estimates resting energy expenditure, not a strict laboratory basal measurement.
What if I do not know which number to enter?
Read the explanation below each field. The initial values are examples, not your measurements. Use your scale or tape for body measurements. For a calorie budget, start with the Calorie or TDEE calculator. Optional water allowances can stay at zero.
Can I switch between kilograms and pounds or centimetres and inches?
Yes, where body measurements are used. Changing the unit selector converts the entered values. Imperial height is total inches: 5 feet 9 inches is 69 inches, not 5.9.
Who is this calculator intended for?
Generally healthy adults aged 20–78 who are not pregnant or breastfeeding. It is not intended for children, eating-disorder recovery, medically prescribed diets or fluid restrictions.
Why can another calculator give a different result?
Tools may use different equations, activity assumptions, unit conversions or rounding. Compare the method and inputs before comparing the result. None of these estimates is an exact measurement.
How do I save my result?
Calculate first, then choose Download PNG or Print / Save PDF. The export includes the inputs, results, explanation, method and references. Your site logo is included when configured; otherwise a Foodmanac wordmark is used.
Are my measurements sent to Foodmanac?
This plugin calculates in your browser and does not send your measurements. Food search sends the food name to the website. Other site plugins may have their own analytics or privacy behavior.
Sources and methodology
Source-backed equations are distinguished from Foodmanac planning presets. No result is an exact measurement or a medical prescription. Content version: 1.1.0.
Keep exploring Foodmanac
- TDEE Calculator
- Calorie Calculator
- Macro Calculator
- High-protein foods
- Explore foods
- Compare foods
- Build a food mix
- Coffee Calories With Milk and Sugar: A Simple Cup-by-Cup Guide
- Tempeh vs Tofu Nutrition: Protein, Calories, Fiber and B12
- Black Sesame Nutrition: Calories, Protein, Calcium and Iron
- Babyfood, cereal, egg yolks and bacon, junior nutrition
- Babyfood, cereal, with egg yolks, junior nutrition
- Babyfood, cereal, with egg yolks, strained nutrition
Measurements stay in this browser through this plugin. PNG and PDF exports contain the details you entered; share them only as you intend. Other site analytics and plugins have their own privacy behavior.